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root/jsr166/jsr166/src/test/tck/StampedLockTest.java

Comparing jsr166/src/test/tck/StampedLockTest.java (file contents):
Revision 1.37 by jsr166, Mon Jul 3 19:36:24 2017 UTC vs.
Revision 1.38 by jsr166, Thu Sep 21 17:52:52 2017 UTC

#	Line 1180 | Line 1180 | public class StampedLockTest extends JSR
1180		}
1181		assertUnlocked(lock);
1182		}
1183	+
1184	+	/**
1185	+	* Stamped locks are not reentrant.
1186	+	*/
1187	+	public void testNonReentrant() throws InterruptedException {
1188	+	final StampedLock lock = new StampedLock();
1189	+	long stamp;
1190	+
1191	+	stamp = lock.writeLock();
1192	+	assertValid(lock, stamp);
1193	+	assertEquals(0L, lock.tryWriteLock(0L, DAYS));
1194	+	assertEquals(0L, lock.tryReadLock(0L, DAYS));
1195	+	assertValid(lock, stamp);
1196	+	lock.unlockWrite(stamp);
1197	+
1198	+	stamp = lock.tryWriteLock(1L, DAYS);
1199	+	assertEquals(0L, lock.tryWriteLock(0L, DAYS));
1200	+	assertValid(lock, stamp);
1201	+	lock.unlockWrite(stamp);
1202	+
1203	+	stamp = lock.readLock();
1204	+	assertEquals(0L, lock.tryWriteLock(0L, DAYS));
1205	+	assertValid(lock, stamp);
1206	+	lock.unlockRead(stamp);
1207	+	}
1208	+
1209	+	/**
1210	+	* """StampedLocks have no notion of ownership. Locks acquired in
1211	+	* one thread can be released or converted in another."""
1212	+	*/
1213	+	public void testNoOwnership() throws Throwable {
1214	+	ArrayList<Future<?>> futures = new ArrayList<>();
1215	+	for (Function<StampedLock, Long> writeLocker : writeLockers())
1216	+	for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers()) {
1217	+	StampedLock lock = new StampedLock();
1218	+	long stamp = writeLocker.apply(lock);
1219	+	futures.add(cachedThreadPool.submit(new CheckedRunnable() {
1220	+	public void realRun() {
1221	+	writeUnlocker.accept(lock, stamp);
1222	+	assertUnlocked(lock);
1223	+	assertFalse(lock.validate(stamp));
1224	+	}}));
1225	+	}
1226	+	for (Future<?> future : futures)
1227	+	assertNull(future.get());
1228	+	}
1229		}

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